00:01
So write the balanced net ionic and formula unit equations, we have aluminum, which is reacting with water to produce aloh for minus ions and a2 gas.
00:22
So we're going to balance each of these separately here.
00:27
And by balancing this we would have two separate half reactions.
00:35
We'd have the aluminum and the water.
00:38
So aluminum to alh minus.
00:45
Balance the oxygen.
00:48
We'll add four water to the left hand side.
00:51
We'll balance the hydrogen by adding 4h plus to the right and three electrons to the right.
00:58
And then we'll have 2o to h2.
01:03
We'll need to add a water to this side here to balance the oxygen.
01:09
And we will have h2 for there 2h plus 2e minus.
01:21
This will be multiplied by 3, be multiplied by 2 .2.
01:27
And this would give us 8h2o 2 aluminum we'll kind of line up our arrows here 2 aloh8 6 electrons and this is multiplied by 3 6 electrons 6h plus 3h20 and this would be 3o cancel 6 electrons 6 electrons cancel 8h plus 2 on the right hand side and i get 2a l plus 8 and then this would give me 2 aloh and what we'll do here is cancel up the h plus we'd have 2h2 2h000 out here this would be with 6h2 on the left and this will be with 6h2 on the left and this this would give us a total here of two, sorry, let's back this up here...